Medical Definition of chamomile
1a: a composite herb (Chamaemelum nobile synonym Anthemis nobilis) of Europe and Africa having aromatic flower headsb: any of several related composite plants (genera Anthemis and Matricaria); especially : a Eurasian herb of the genus Matricaria (M. recutita synonym M. chamomilla) naturalized in North America
2: the dried flower heads of a chamomile that are often used in making tea and that yield an essential oil possessing medicinal properties
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